tests: fix stdlib test

plantuml#1692 (comment)

.gitignore

@@ -8,7 +8,7 @@
 out
 
 #vscode files
-/bin
+**/bin/
 
 # Ant result file
 plantuml.jar

src/net/sourceforge/plantuml/preproc/Stdlib.java

@@ -3,10 +3,13 @@
 import static java.nio.charset.StandardCharsets.UTF_8;
 
 import java.awt.image.BufferedImage;
+import java.io.BufferedInputStream;
 import java.io.BufferedReader;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.DataInputStream;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
@@ -317,9 +320,12 @@ private InputStream getDataImagePngBase64() throws IOException {
 		return new BrotliInputStream(raw);
 	}
 
-	private static InputStream getInternalInputStream(String fullname, String extension) {
-		final String res = "/stdlib/" + fullname + extension;
-		return Stdlib.class.getResourceAsStream(res);
+	private static InputStream getInternalInputStream(String fullname, String extension) throws FileNotFoundException {
+		final String path = "stdlib/" + fullname + extension;
+		InputStream result = Stdlib.class.getResourceAsStream("/" + path);
+		if (result == null)
+			result = new BufferedInputStream(new FileInputStream(path));
+		return result;
 	}
 
 	public static void extractStdLib() throws IOException {

test/net/sourceforge/plantuml/tim/EaterTest.java

@@ -32,8 +32,7 @@ class EaterTest {
         "'@startuml\n!$a=[1, 2, 3]\ntitle xx $a[2] yy\na -> a\n'                                         , xx 3 yy",
         "'@startuml\ntitle\n!foreach $i in [1, 2, 3]\nxx $i yy\n!endfor\nendtitle\na -> a\n'             , xx 2 yy",
         "'@startuml\ntitle\n!foreach $i in [\"a\", \"b\", \"c\"]\nxx $i yy\n!endfor\nendtitle\na -> a\n' , xx b yy",
-// TODO: fix code to allow test to access on stdlib, the corresponding (not working) test is here:
-//        "'@startuml\nstdlib\n@enduml', archimate",
+        "'@startuml\nstdlib\n@enduml', archimate",
 	})
 	void Test_EaterTest(String input, String expected) throws Exception {
 		assertRenderExpectedOutput(input, expected);